---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-233855"
form_type: "8-K"
ticker: "MGM"
cik: "0000789570"
company_name: "MGM Resorts International"
filed_at: "2023-09-13T23:59:59+00:00"
generated_at: "2026-06-10T19:38:37.978287+00:00"
event_type: "cyber"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "medium"
source: SEC EDGAR
---

# MGM Resorts reports cybersecurity issue; systems shut down, investigation ongoing

## Summary
- Cybersecurity issue affecting certain MGM Resorts systems identified on September 12, 2023.
- Investigation underway with leading external cybersecurity experts; law enforcement notified.
- Company shut down certain systems to protect data and operations.
- Investigation ongoing; no disclosure yet on scope or customer data impact.
- MGM Resorts implementing measures to secure business operations.

## SEC filing metadata
- accession: 0001193125-23-233855
- form_type: 8-K
- ticker: MGM
- cik: 0000789570
- company_name: MGM Resorts International
- filed_at: 2023-09-13T23:59:59+00:00
- event_type: cyber
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: medium
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/789570/000119312523233855/0001193125-23-233855-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/789570/000119312523233855/d502352d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-233855
- JSON: https://secwatch.observer/filing/0001193125-23-233855.json
- Plain text: https://secwatch.observer/filing/0001193125-23-233855.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.